Year	annual %
1987	1.55423933652312
1988	3.0319491601762
1989	-1.63345378531122
1990	3.81967551112639
1991	-1.57312539711563
1992	1.25971809435816
1993	-4.69495614481039
1994	-1.27693440109087
1995	-0.132684069956767
1996	1.36501319739561
1997	-0.0315310579167232
1998	0.350174559159242
1999	-0.086699484837041
2000	-1.46853847172784
2001	3.44190318003295
2002	7.03478549133649
2003	3.80765167735389
2004	4.79814785559974
2005	3.51461802891053
2006	6.38514580803302
2007	2.70428297293437
2008	2.72909532002873
2009	3.09798072458744
2010	3.70212168017734
2011	2.77865487592099
2012	2.58269084982692
2013	3.96088605913079
2014	4.45047919254276
2015	2.36496393160147
2016	-0.592843837936769
2017	-0.181402104689582